Calculate the fraction of lattice sites that are Schottky defects for cesium chl

Question

Calculate the fraction of lattice sites that are Schottky defects for cesium chloride at its melting temperature (645oC). Assume an energy for defect formation of 1.86 eV/atom.

Calculate the number of Frenkel defects per cubic meter in zinc oxide at 910 C. The energy for defect formation is 2.51 eV/atom, while the density for ZnO is 5.55 g/cm3at this temperature.

What is the composition, in atom percent, of an alloy that consists ofa)91.5 wt% Ag andb)8.5 wt% Cu?

For an alloy that consists of 35 at% Zn and 65 at% Cu, what are the concentrations (a) of Zn (in weight percent), and (b) of Cu (in weight percent)?  

For an alloy that consists of 97.1 g copper, 105 g zinc, and 6.23 g lead, what are the concentrations of (a) Cu (in weight percent), (b) Zn (in weight percent), and (c) Pb (in weight percent)?  

What is the composition, in atom percent, of an alloy that containsa)33 g copper andb)48 g zinc?

The concentration of silicon in an iron-silicon alloy is 0.25 wt%. What is the concentration in kilograms of silicon per cubic meter of alloy?
Assume that the densities for iron and silicon are, respectively, 7.87 and 2.33 g/cm3.

Determine the ASTM grain size number if 32 grains per square inch are measured at a magnification of 260.

Explanation / Answer

we can use the formula,

1.86 / 2 x 8.62 x 10-5 x 1183 = 9.11

Concentration of Cu = 97.1 / 208.23 x 100 = 46.63 %

  Concentration of Pb = 6.23 / 208.23 x 100 =2.99 %

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